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Posted to dev@drill.apache.org by "Charles Givre (Jira)" <ji...@apache.org> on 2021/10/22 14:29:00 UTC

[jira] [Resolved] (DRILL-7979) Self-Closing XML Tags Cause Schema Change Exceptions

     [ https://issues.apache.org/jira/browse/DRILL-7979?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Charles Givre resolved DRILL-7979.
----------------------------------
    Resolution: Fixed

> Self-Closing XML Tags Cause Schema Change Exceptions
> ----------------------------------------------------
>
>                 Key: DRILL-7979
>                 URL: https://issues.apache.org/jira/browse/DRILL-7979
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Storage - Other
>    Affects Versions: 1.19.0
>            Reporter: Charles Givre
>            Assignee: Charles Givre
>            Priority: Major
>             Fix For: 1.20.0
>
>
> Self closing XML tags are dealt with strangely by java's streaming parser.  If you have data where you have one row containing a self closing XML tag foo (<foo/>) but then in the next row `foo` contains a map or other nested field, Drill will throw a schema change exception.  
> This proposed fix causes Drill to ignore self-closing tags unless they have attributes, which allows data like this to be successfully queried.
>  



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